Offshore wind power system, vegetable oil transformer and heat dissipation method thereof

Abstract

The present application relates to an offshore wind power system, a vegetable oil transformer and a heat dissipation method thereof, wherein the heat dissipation method adopts a heat dissipation structure as part of the outer wall of the tower of the offshore wind power system, and dissipates heat in a manner of direct contact with the air of the external environment of the tower. The heat dissipation method is adjusted to the design idea of ​​open-air wind blowing, which changes the traditional design of all structures being arranged inside the tower to prevent wind and water. This is an improvement made to the transformer based on the development of anti-corrosion technology in the past decade, overcoming the traditional prejudice that the vegetable oil transformer for offshore wind power must be arranged inside a closed tower, and also overcoming the industry prejudice that the tower of offshore wind power must be realized as a whole in traditional technology, improving the heat dissipation effect of the vegetable oil transformer for offshore wind power, and being conducive to reducing the temperature of the transformer oil of the vegetable oil transformer for offshore wind power, thereby delaying the aging of the transformer oil, and also ensuring the service life of the internal insulation material of the vegetable oil transformer for offshore wind power.

Description

Technical Field

[0001] The present application relates to the field of transformers for offshore wind power, and in particular to offshore wind power systems, vegetable oil transformers and heat dissipation methods thereof, specifically to offshore wind power systems, vegetable oil transformers for offshore wind power and heat dissipation methods for vegetable oil transformers for offshore wind power. Background Art

[0002] Offshore wind farms refer to offshore wind power, which uses wind towers to generate electricity. Monopile wind towers and jecket wind towers are usually used in shallow sea areas with a water depth of about 10 meters; floating wind towers are usually used in slightly deeper seas. Compared with onshore wind farms, the advantages of offshore wind farms are that they do not occupy land resources, are basically not affected by topography, have higher wind speeds, richer wind energy resources, larger wind turbine unit capacity, and higher annual utilization hours. However, the technical difficulty of offshore wind farm construction is also relatively large, and the construction cost is generally 2 to 3 times that of onshore wind farms. China now operates nearly half of the world's offshore wind power installed capacity, but due to the impact of the offshore environment, operation and maintenance are more difficult.

[0003] The towers of wind towers are mainly truss-type and tube-type. In order to protect the equipment inside the tower, the tower is usually tube-type, or part of the tube-type is combined with part of the truss. Since the transformer is arranged inside the tower, it is surrounded by the tube-type tower formed by rolling and welding steel plates, and the internal space of the tower is narrow, so there is a certain heat dissipation problem. Reference can be made to the patent document with announcement number CN216198716U, which discloses a configuration structure for built-in electrical equipment at the bottom of an offshore wind turbine generator. The whole set of electrical equipment is arranged in the wind turbine tower. The electrical equipment includes a main transformer, a ring network cabinet, a converter, an auxiliary transformer and a control cabinet. The tower is provided with a first floor and a second floor at the bottom of the tower. The first floor at the bottom of the tower is used to place the main transformer; the second floor at the bottom of the tower is used to place the ring network cabinet, the converter, the control cabinet and the auxiliary transformer. The internal space utilization rate of the tower in this patent document is relatively high, so the heat dissipation problem is more severe.

[0004] The applicant also proposed a method for designing power transformers for offshore wind power in the patent document with publication number CN114154299A. In view of the difference between offshore wind power and onshore wind power, the transformer insulation, temperature rise and short circuit resistance are adapted, and the external structure of the transformer is adapted, so that the transformer can have anti-corrosion and anti-shake characteristics, ensuring that the transformer can operate normally for a long time at sea. However, the above design method does not take into account the heat dissipation problem of accommodating a large number of equipment in the narrow space inside the tower. Summary of the invention

[0005] Based on this, it is necessary to provide an offshore wind power system, a vegetable oil transformer and a heat dissipation method thereof.

[0006] A heat dissipation method for a vegetable oil transformer for offshore wind power generation adopts a heat dissipation structure as a part of the outer wall of a tower of an offshore wind power generation system to dissipate heat in a manner of direct contact with air in an environment outside the tower.

[0007] The heat dissipation method of the above-mentioned vegetable oil transformer for offshore wind power has been adjusted to an open-air wind blowing design concept, changing the traditional design of setting the entire structure inside the tower to prevent wind and water. This is an improvement on the transformer based on the development of anti-corrosion technology in the past decade. It overcomes the prejudice of traditional technology that vegetable oil transformers for offshore wind power must be set inside a closed tower, and also overcomes the industry prejudice of traditional technology that the tower of offshore wind power must be realized as a whole. It improves the heat dissipation effect of vegetable oil transformers for offshore wind power, is beneficial to reducing the temperature of the transformer oil of the vegetable oil transformer for offshore wind power, thereby delaying the aging of the transformer oil, and also ensuring the service life of the internal insulation material of the vegetable oil transformer for offshore wind power.

[0008] Furthermore, in one of the embodiments, the heat dissipation structure, which is a part of the outer wall of the tower of the offshore wind power system, also dissipates heat by directly contacting the seawater in the external environment of the tower.

[0009] In one embodiment, the heat dissipation structure has a main body and an anti-corrosion outer layer, the main body and the anti-corrosion outer layer are arranged in close contact and the edges are sealed, at least a portion of the anti-corrosion outer layer serves as a portion of the outer wall of a tower of an offshore wind power system; and / or, a heat-conducting medium is provided between the main body and the anti-corrosion outer layer.

[0010] In one of the embodiments, heat is dissipated by guiding air into the interior of the tower through the heat dissipation structure, and the air only flows through the interior of the heat dissipation structure.

[0011] In one of the embodiments, the heat dissipation structure is provided with an air duct penetrating the tower, so that air from the external environment of the tower passes through the air duct.

[0012] In one of the embodiments, the air duct has a preset inclination to allow seawater to flow out; and / or, the heat dissipation structure is provided with an anti-corrosion layer on the wall of the air duct; and / or, the air duct is cleaned regularly with high-pressure air or water.

[0013] In one embodiment, the heat dissipation structure is partially embedded in the tower and partially protrudes from the outer surface of the tower; and / or,

[0014] The heat dissipation structure occupies less than 10% of the outer surface area of ​​the tower; and / or,

[0015] The heat dissipation structure has at least two separated parts.

[0016] In one of the embodiments, the heat dissipation structure is insulated from the tower.

[0017] In one of the embodiments, the heat dissipation structure forms a smooth transition at a position where it is connected to or adjacent to other outer walls of the tower; or, the anti-corrosion outer layer of the heat dissipation structure forms a smooth transition with other outer walls of the tower.

[0018] In one of the embodiments, the heat dissipation structure is used as a part of the shell of a vegetable oil transformer for offshore wind power.

[0019] In one of the embodiments, the electrical control cabinet is installed in the reserved space of the housing.

[0020] In one of the embodiments, a vegetable oil transformer for offshore wind power includes a heat dissipation structure, and the vegetable oil transformer for offshore wind power is implemented by any of the heat dissipation methods described above.

[0021] In one embodiment, an offshore wind power system includes a tower and the offshore wind power vegetable oil transformer, wherein the offshore wind power vegetable oil transformer is installed in the tower, and the heat dissipation structure of the offshore wind power vegetable oil transformer is used as part of the outer wall of the tower. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 This is a schematic diagram of the application environment of an embodiment of the heat dissipation method for a vegetable oil transformer for offshore wind power described in this application.

[0024] Figure 2 This is a schematic diagram of the application environment of another embodiment of the heat dissipation method for a vegetable oil transformer for offshore wind power described in this application.

[0025] Figure 3 This is a schematic diagram of the application environment of another embodiment of the heat dissipation method for a vegetable oil transformer for offshore wind power described in this application.

[0026] Figure 4 This is a schematic diagram of the application environment of another embodiment of the heat dissipation method for a vegetable oil transformer for offshore wind power described in this application.

[0027] Figure 5This is a schematic diagram of the application environment of another embodiment of the heat dissipation method for a vegetable oil transformer for offshore wind power described in this application.

[0028] Figure 6 This is a schematic diagram of the application environment of another embodiment of the heat dissipation method for a vegetable oil transformer for offshore wind power described in this application.

[0029] Figure 7 This is a schematic diagram of the application environment of another embodiment of the heat dissipation method for a vegetable oil transformer for offshore wind power described in this application.

[0030] Figure 8 This is a schematic diagram of the application environment of another embodiment of the heat dissipation method for a vegetable oil transformer for offshore wind power described in this application.

[0031] Reference numerals: tower 100 , heat dissipation structure 200 , body 210 , anti-corrosion outer layer 220 , heat-conducting medium 230 , air duct 240 . DETAILED DESCRIPTION

[0032] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0033] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it may be directly on the other component or there may also be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be a central component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of this application are for illustrative purposes only and do not represent the only implementation method.

[0034] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0035] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first feature is directly in contact with the second feature, or the first feature and the second feature are indirectly in contact through an intermediate medium. Moreover, a first feature being “above”, “above” or “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below” or “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0036] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more related listed items.

[0037] The present application discloses an offshore wind power system, a vegetable oil transformer and a heat dissipation method thereof, which include partial structures, all structures, partial steps or all steps of the following embodiments; that is, the offshore wind power system, the vegetable oil transformer and the heat dissipation method thereof include some or all of the following technical features. In one embodiment of the present application, a heat dissipation method for a vegetable oil transformer for offshore wind power, which uses a heat dissipation structure as a part of the outer wall of a tower of the offshore wind power system, and dissipates heat in a manner of direct contact with the air of the external environment of the tower. The heat dissipation method of the above-mentioned vegetable oil transformer for offshore wind power has been adjusted to an open-air wind blowing design concept, changing the traditional design of setting the entire structure inside the tower to prevent wind and water. This is an improvement on the transformer based on the development of anti-corrosion technology in the past decade. It overcomes the prejudice of traditional technology that vegetable oil transformers for offshore wind power must be set inside a closed tower, and also overcomes the industry prejudice of traditional technology that the tower of offshore wind power must be realized as a whole. It improves the heat dissipation effect of vegetable oil transformers for offshore wind power, is beneficial to reducing the temperature of the transformer oil of the vegetable oil transformer for offshore wind power, thereby delaying the aging of the transformer oil, and also ensuring the service life of the internal insulation material of the vegetable oil transformer for offshore wind power.

[0038] In one embodiment of the present application, a heat dissipation method for a vegetable oil transformer for offshore wind power is as follows: Figure 1As shown, it adopts the heat dissipation structure 200 as part of the outer wall of the tower 100 of the offshore wind power system, and dissipates heat in a manner of direct contact with the air of the external environment of the tower 100. Further, in one of the embodiments, the heat dissipation structure as part of the outer wall of the tower of the offshore wind power system also dissipates heat in a manner of direct contact with the seawater of the external environment of the tower. That is, a heat dissipation method for a vegetable oil transformer for offshore wind power, which adopts the heat dissipation structure as part of the outer wall of the tower of the offshore wind power system, and dissipates heat in a manner of direct contact with the air and seawater of the external environment of the tower; that is, the heat dissipation method adopts the heat dissipation structure as part of the outer wall of the tower of the offshore wind power system, and dissipates heat in a manner of direct contact with the air of the external environment of the tower; and the heat dissipation structure as part of the outer wall of the tower of the offshore wind power system also dissipates heat in a manner of direct contact with the seawater of the external environment of the tower. Further, in one embodiment, the heat dissipation structure as part of the outer wall of the tower of the offshore wind power system is arranged at a height of 0.3 to 2 meters from the highest state of the sea level; that is, in the state of high tide, the sea level is simulated into a simulated plane, and the lowest point of the heat dissipation structure has a height difference of at least 0.3 to 2 meters from the simulated plane, so that it can be contacted by waves and avoid being soaked by sea water. Such a design overcomes the industry prejudice that the vegetable oil transformer for offshore wind power cannot contact sea water in traditional technology, actively contacts the sea breeze and sea water, actively calculates the corrosion status, and directly solves the corrosion problem through maintenance. Therefore, compared with the traditional offshore wind power vegetable oil transformer that is stuffy inside the closed tower, it has a significantly improved heat dissipation effect, which is conducive to reducing the temperature of the transformer oil of the offshore wind power vegetable oil transformer, thereby delaying the aging of the transformer oil, and also ensuring the service life of the internal insulation material of the offshore wind power vegetable oil transformer. Combined with the embodiment with an anti-corrosion outer layer, it has the advantage of easy maintenance, takes into account the needs of heat dissipation and anti-corrosion, and improves the normal service life of the offshore wind power vegetable oil transformer.

[0039] In one embodiment, the heat dissipation structure has at least two separated parts; this can be used as a decentralized design to increase the air contact surface in various directions, such as forming multiple sectors or multiple rings to adapt to wind forces in different directions. In one embodiment, the heat dissipation structure is partially embedded in the tower and partially protrudes from the outer surface of the tower; that is, part of the heat dissipation structure is in the tower, and the other part protrudes outside the tower. Such a design is conducive to enhancing the stability of the structure on the one hand, and improving the heat dissipation effect on the other hand.

[0040] In one embodiment, the heat dissipation structure occupies less than 10% of the outer surface area of ​​the tower; that is, the outer surface area of ​​the heat dissipation structure located on the outer wall of the tower is less than 10% compared with the total outer surface area of ​​the tower. In one embodiment, the heat dissipation structure occupies less than 8% of the outer surface area of ​​the tower. Generally, a part of the heat dissipation structure can be used as a part of the outer wall of the tower of the offshore wind power system, and there is no need to have too much to avoid affecting the safety of the overall structure.

[0041] In one embodiment, the heat dissipation structure comprises a main body and an anti-corrosion outer layer, the main body and the anti-corrosion outer layer are arranged in close contact and the edges are sealed, and at least part of the anti-corrosion outer layer serves as part of the outer wall of the tower of the offshore wind power system; further, in one embodiment, the anti-corrosion outer layer is at least partially embedded in the tower. In one embodiment of the present application, a heat dissipation method for a vegetable oil transformer for offshore wind power is as follows: Figure 2 As shown, the heat dissipation structure has a body 210 and an anti-corrosion outer layer 220, the body 210 and the anti-corrosion outer layer 220 are arranged in close contact and the edges are sealed, and at least part of the anti-corrosion outer layer 220 serves as part of the outer wall of the tower 100 of the offshore wind power system; in this embodiment, the anti-corrosion outer layer 220 is at least partially embedded in the interior of the tower 100. In one embodiment, the anti-corrosion outer layer is a stainless steel layer; or in each embodiment, the anti-corrosion outer layer includes an anti-rust metal base layer and an anti-corrosion coating. The specific anti-corrosion outer layer or its anti-corrosion design scheme is not the innovation of the present application, and the anti-corrosion outer layer can be directly purchased or the anti-corrosion design scheme can be directly applied to obtain the anti-corrosion outer layer.

[0042] In one embodiment, a heat conducting medium is provided between the main body and the anti-corrosion outer layer. The heat conducting medium includes but is not limited to a coating, nanoparticles, etc.; the heat conducting medium also includes water or other phase change substances. In one embodiment of the present application, a heat dissipation method for a vegetable oil transformer for offshore wind power generation is as follows: Figure 3 As shown, the heat dissipation structure has a body 210 and an anti-corrosion outer layer 220, the body 210 and the anti-corrosion outer layer 220 are arranged in close contact and sealed at the edges, and at least part of the anti-corrosion outer layer 220 serves as part of the outer wall of the tower 100 of the offshore wind power system; in this embodiment, the anti-corrosion outer layer 220 is at least partially embedded in the interior of the tower 100, and a heat conducting medium 230 is arranged between the body 210 and the anti-corrosion outer layer 220. The rest of the embodiments are similar and will not be described in detail.

[0043] Furthermore, in one embodiment, the anti-corrosion outer layer is at least partially covered on the outside of the tower. In one embodiment of the present application, a heat dissipation method for a vegetable oil transformer for offshore wind power is as follows: Figure 4As shown, Figure 2 The difference between the embodiment shown is that the anti-corrosion outer layer 220 is at least partially covered on the outside of the tower 100. In this embodiment, the anti-corrosion outer layer 220 of the heat dissipation structure forms a smooth transition with other outer walls of the tower 100. In one embodiment of the present application, a heat dissipation method for a vegetable oil transformer for offshore wind power generation is as follows Figure 5 As shown, Figure 4 The embodiment shown is different in that a heat-conducting medium 230 is provided between the body 210 and the anti-corrosion outer layer 220. For the embodiment in which the anti-corrosion outer layer is covered on the outside of the tower, it is necessary to consider solving the problem of water ingress into the gaps. Therefore, in combination with the steel structure design of the tower as much as possible, a part of the anti-corrosion outer layer is covered on the outside of the tower, and at the same time, a part of the tower is extended to form an umbrella edge to block the structure of the anti-corrosion outer layer covered on the outside of the tower, so that seawater or rainwater flows directly to the outside of the anti-corrosion outer layer, avoiding water ingress into the gaps, so as to ensure the design life of the heat dissipation structure, thereby ensuring the normal design life of the transformer.

[0044] In order to avoid the influence of thermal expansion and contraction on the sealing performance, further, in one of the embodiments, the heat-conducting medium is a solid-liquid phase changer, and the solid-liquid phase changer is used to be liquid when the temperature exceeds the target value, and solid when the temperature does not exceed the target value. The target value can be designed according to actual needs, that is, the material of the phase changer is designed according to actual needs. Further, in one of the embodiments, the main body and the anti-corrosion outer layer are arranged in close contact and the edge is sealed to form a sealed cavity, and the heat-conducting medium is contained in the sealed cavity, and the volume of the sealed cavity is not less than the volume increased by the two-state phase change of the solid-liquid phase changer. Compared with the gas-liquid two-state phase change or the solid-gas two-state phase change, the solid-liquid two-state phase change has a smaller effect on the volume change. Therefore, the design of the phase change body is adopted, and the volume limit of the sealed cavity is matched to make full use of the smaller effect of the solid-liquid two-state phase change on the volume change, so as to ensure the sealing between the main body and the anti-corrosion outer layer, and avoid the leakage of the heat-conducting medium due to the failure of the sealed cavity caused by the two-state phase change, which pollutes the environment on the one hand and loses the conduction and heat dissipation effect of an important part on the other hand, so as to avoid the reduction of the heat dissipation effect caused by the loss of the conduction and heat dissipation effect of an important part. Further, in one embodiment, the solid-liquid phase change body is a bismuth, lead, tin and cadmium alloy. Further, the solid-liquid phase change body may contain mercury or indium, and may also contain mercury and indium at the same time. The solid-liquid phase change body can be purchased directly in the current market. The specific alloy to be used or the solid-liquid phase change body to be purchased can be determined by designing the target value according to actual needs. Such a design, on the one hand, is conducive to improving the heat dissipation effect between the body and the anti-corrosion outer layer, and on the other hand, is conducive to preventing the heat-conducting medium from affecting the sealing between the body and the anti-corrosion outer layer due to thermal expansion and contraction, thereby ensuring that the body is protected by the anti-corrosion outer layer from corrosion. When performing daily maintenance according to the service life designed for the heat dissipation structure, it is only necessary to remove the original anti-corrosion outer layer, recycle the original heat-conducting medium and use it directly or add a new heat-conducting medium and replace it with a new anti-corrosion outer layer. The replaced anti-corrosion outer layer can be recycled and reused, and the body does not need to be replaced under the protection of the anti-corrosion outer layer. Therefore, while improving the heat dissipation effect of the transformer, the normal service life of the transformer is also guaranteed.

[0045] In one of the embodiments, the heat dissipation structure is insulated from the tower. In one of the embodiments, the heat dissipation structure forms a smooth transition at the position where it is connected to or adjacent to other outer walls of the tower; or, the anti-corrosion outer layer of the heat dissipation structure forms a smooth transition with other outer walls of the tower. In one of the embodiments, the heat dissipation structure is used as a part of the shell of a vegetable oil transformer for offshore wind power. In order to solve the problem that the internal structure of the tower is narrow and it is difficult to arrange the positions of a large number of equipment, in one of the embodiments, the electrical control cabinet is installed in the reserved space of the shell. There are many kinds of electrical control cabinets. Installing the electrical control cabinet in the reserved space of the shell can, on the one hand, reasonably utilize the heat dissipation function of the shell and its heat dissipation structure, and on the other hand, it is conducive to improving the integration and saving installation space.

[0046] Furthermore, the oil tank and shell of the vegetable oil transformer for offshore wind power have a phase-separated structure; further, the oil tank of the vegetable oil transformer for offshore wind power is separately arranged from the heat dissipation structure, and the oil tank transmits transformer oil through an oil pipeline to achieve heat exchange with the heat dissipation structure. In one of the embodiments, heat is dissipated by guiding air into the interior of the tower through the heat dissipation structure, and the air only flows through the interior of the heat dissipation structure, that is, the air only enters the interior of the heat dissipation structure and does not enter the interior of other parts of the tower, that is, the air is separated by the heat dissipation structure when it is inside the tower to avoid entering other equipment inside the tower. Further, in one of the embodiments, the heat dissipation structure is provided with an air duct for enhancing the heat dissipation effect of air convection. In one embodiment of the present application, a heat dissipation method for a vegetable oil transformer for offshore wind power is as follows: Figure 6 As shown, Figure 1 The difference from the illustrated embodiment is that the heat dissipation structure 200 is provided with an air duct 240 for air inlet and outlet, so as to enhance the heat dissipation effect of air convection.

[0047] In one embodiment, the heat dissipation structure is provided with an air duct penetrating the tower, so that air from the external environment of the tower passes through the air duct. Figure 7 As shown, Figure 6 The difference from the illustrated embodiment is that the heat dissipation structure 200 is provided with an air duct 240 penetrating the tower 100 .

[0048] In one embodiment, the air duct has a preset inclination to allow seawater to flow out and avoid unpredictable corrosion problems caused by seawater accumulation; In one embodiment of the present application, a heat dissipation method for a vegetable oil transformer for offshore wind power is as follows Figure 8As shown, the heat dissipation structure 200 is provided with an air duct 240 that passes through the tower 100, and the air duct 240 has a preset inclination. The preset inclination is usually 5 to 20 degrees, which cannot be too small to prevent the seawater from flowing away, nor too large to affect the installation of the transformer inside the tower. In order to avoid blockage, in one embodiment, high-pressure air or water is also used to clean the air duct regularly. Furthermore, high-pressure and high-temperature air or water is also used to clean the air duct regularly. Among them, the high pressure and the high temperature are relative concepts, for example, high temperature is more than 60 or 70 degrees Celsius, and high pressure is more than normal air pressure. Such a design is conducive to preventing organisms, especially marine plants from growing in the air duct or marine animals from attaching to the air duct, thereby preventing organisms from clogging the air duct.

[0049] In one of the embodiments, the heat dissipation structure is provided with an anti-corrosion layer on the wall of the air duct. In one of the embodiments, the air duct has a preset inclination to allow seawater to flow out; and the heat dissipation structure is provided with an anti-corrosion layer on the wall of the air duct. The remaining embodiments are analogous and will not be described in detail. Furthermore, the air duct includes a main air duct running through the tower and at least two peripheral air ducts adjacent to the surface of the tower, that is, the heat dissipation structure is provided with a main air duct running through the tower and at least two peripheral air ducts adjacent to the surface of the tower to maximize the air convection heat dissipation effect. Such a design overcomes the prejudice of traditional technology that vegetable oil transformers for offshore wind power must be set inside a closed tower, changes the traditional design of all structures being set inside the tower to prevent wind and water, and adjusts it to a design concept of open-air wind blowing, thereby improving the heat dissipation effect of vegetable oil transformers for offshore wind power.

[0050] In one embodiment, a vegetable oil transformer for offshore wind power includes a heat dissipation structure, and the vegetable oil transformer for offshore wind power is implemented by the heat dissipation method described in any embodiment. That is, the vegetable oil transformer for offshore wind power adopts a heat dissipation structure as part of the outer wall of the tower of the offshore wind power system, which is used to dissipate heat in a way of direct contact with the air of the external environment of the tower. Such a design is adjusted to the design idea of ​​open-air wind blowing, changing the traditional design of all structures being set inside the tower to prevent wind and water. This is an improvement made to the transformer based on the development of anti-corrosion technology in the past decade, overcoming the traditional technology's prejudice that the vegetable oil transformer for offshore wind power must be set inside a closed tower, and also overcoming the traditional technology's industry prejudice that the tower of offshore wind power must be realized as a whole, improving the heat dissipation effect of the vegetable oil transformer for offshore wind power, and is conducive to reducing the temperature of the transformer oil of the vegetable oil transformer for offshore wind power, thereby delaying the aging of the transformer oil, and also ensuring the service life of the internal insulation material of the vegetable oil transformer for offshore wind power.

[0051] In one embodiment, an offshore wind power system includes a tower and the offshore wind power vegetable oil transformer of any embodiment, wherein the offshore wind power vegetable oil transformer is installed in the tower, and the heat dissipation structure of the offshore wind power vegetable oil transformer is used as part of the outer wall of the tower. The tower can be a tube tower type, or a partial tube tower type combined with a partial truss type.

[0052] It should be noted that other embodiments of the present application also include offshore wind power systems, vegetable oil transformers and heat dissipation methods that can be implemented by combining the technical features in the above embodiments.

[0053] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0054] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the scope of patent protection of the present application shall be subject to the attached claims.

Claims

1. A heat dissipation method for a vegetable oil transformer for offshore wind power, characterized in that: A heat dissipation structure is used as part of the outer wall of the tower of the offshore wind power system to dissipate heat in a manner of direct contact with the air of the external environment of the tower; The heat dissipation structure comprises a main body and an anti-corrosion outer layer, the main body and the anti-corrosion outer layer are arranged in close contact and the edges are sealed, and at least part of the anti-corrosion outer layer serves as part of the outer wall of the tower of the offshore wind power system; A heat-conducting medium is provided between the main body and the anti-corrosion outer layer; The heat-conducting medium is a solid-liquid phase changer, and the solid-liquid phase changer is used to be in a liquid state when the temperature exceeds the target value, and in a solid state when the temperature does not exceed the target value; the main body and the anti-corrosion outer layer are arranged in close contact and the edges are sealed to form a sealed cavity, and the heat-conducting medium is accommodated in the sealed cavity, and the volume of the sealed cavity is not less than the volume increased by the two-state phase change of the solid-liquid phase changer; Moreover, the heat dissipation structure also dissipates heat by directly contacting the seawater in the external environment of the tower; wherein the heat dissipation structure, which is part of the outer wall of the tower of the offshore wind power system, is arranged at a height of 0.3 to 2 meters from the highest state of the sea level.

2. The heat dissipation method of the vegetable oil transformer for offshore wind power according to claim 1 is characterized in that: The heat dissipation structure also guides air into the interior of the tower to dissipate heat, and the air only flows through the interior of the heat dissipation structure.

3. The heat dissipation method of the vegetable oil transformer for offshore wind power according to claim 2 is characterized in that: The heat dissipation structure is provided with an air duct penetrating the tower, so that air from the external environment of the tower passes through the air duct.

4. The heat dissipation method of the vegetable oil transformer for offshore wind power according to claim 3 is characterized in that: The air duct has a preset inclination to allow seawater to flow out; and / or, the heat dissipation structure is provided with an anti-corrosion layer on the wall of the air duct; and / or, the air duct is cleaned regularly with high-pressure air or water.

5. The heat dissipation method of the vegetable oil transformer for offshore wind power according to claim 1 is characterized in that: The heat dissipation structure is partially embedded in the tower and partially protrudes from the outer surface of the tower; and / or, The heat dissipation structure occupies less than 10% of the outer surface area of ​​the tower; and / or, The heat dissipation structure has at least two separated parts.

6. The heat dissipation method of the vegetable oil transformer for offshore wind power according to claim 1 is characterized in that: The heat dissipation structure forms a smooth transition at a position where it is connected to or adjacent to other outer walls of the tower; or, the anti-corrosion outer layer of the heat dissipation structure forms a smooth transition with other outer walls of the tower; and / or, The heat dissipation structure is insulated from the tower.

7. The heat dissipation method of the vegetable oil transformer for offshore wind power according to any one of claims 1 to 6, characterized in that: The heat dissipation structure is used as a part of the shell of a vegetable oil transformer for offshore wind power; The oil tank and shell of the vegetable oil transformer for offshore wind power have a phase-separated structure. The oil tank transmits transformer oil through an oil pipeline to achieve heat exchange with the heat dissipation structure, and also guides air into the interior of the tower through the heat dissipation structure to dissipate heat, and the air only flows through the interior of the heat dissipation structure.

8. The heat dissipation method of the vegetable oil transformer for offshore wind power according to claim 7, characterized in that: The electrical control cabinet is installed in the reserved space of the housing.

9. A vegetable oil transformer for offshore wind power, characterized in that: It comprises a heat dissipation structure, and the vegetable oil transformer for offshore wind power is realized by adopting the heat dissipation method described in any one of claims 1 to 8.

10. An offshore wind power system, characterized in that: It comprises a tower and the offshore wind power plant oil transformer according to claim 9, wherein the offshore wind power plant oil transformer is installed in the tower, and the heat dissipation structure of the offshore wind power plant oil transformer is used as part of the outer wall of the tower.

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